2001321220003 has 8 divisors (see below), whose sum is σ = 2343010209120. Its totient is φ = 1673578720320.

The previous prime is 2001321219949. The next prime is 2001321220027. The reversal of 2001321220003 is 3000221231002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2001321220003 - 2¹⁷ = 2001321088931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2001321220303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3486622048 + ... + 3486622621.

It is an arithmetic number, because the mean of its divisors is an integer number (292876276140).

Almost surely, 2^{2001321220003} is an apocalyptic number.

2001321220003 is a deficient number, since it is larger than the sum of its proper divisors (341688989117).

2001321220003 is an equidigital number, since it uses as much as digits as its factorization.

2001321220003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6973244717.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 2001321220003 its reverse (3000221231002), we get a palindrome (5001542451005).

The spelling of 2001321220003 in words is "two trillion, one billion, three hundred twenty-one million, two hundred twenty thousand, three".